Mahabharata 13.79.12
सुरूपा बहुरूपाश्च विश्वरूपाश्च मातरःगावो मामुपतिष्ठन्तामिति नित्यं प्रकीर्तयेत्
surūpā bahurūpāśca viśvarūpāśca mātaraḥgāvo māmupatiṣṭhantāmiti nityaṃ prakīrtayet
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book